Funnily enough I've always put copper with purple, I think when it's Liver of Sulphured it looks a bit pinky so it goes well with purple.The purple is from Efco enamelling powder, it's very tricky to get it on the heart. I soldered a tiny heart on first then used a cotton bud to put the powder onto it and used my finger to press some of the powder into the stamped letters.Lisa x